Nut-lock.



B. B. PACK.

NUTILOGK.

PPPPPPPPPPPPPPPPP 0V. 13, 1911. 1,034,289. PatentedJuly 30, 1912.

INVENTOR 500:?) \5. pack UNITED STATES PATENT OFFICE.

EVAN B. PACK, OF COVINGTON, VIRGINIA.

NUT-LOCK.

Specification of Letters Patent. Application filed November 13, 1911.

Patented July 30, 1912. Serial No. 660,065.

' To all whom it may concern Be it known that I, EVAN B. PACK, a citizen of the United St-ates of America, residing at Covington, in the county of A1leghany and State of Virginia, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification,- referencebeing had therein to the accompanying drawing.

This invention relates to nut locks and has for itsobject the production of a nutlock which will lock the nut against. rot-ations, combinations and arrangements of parts as will be hereinafter fully described and claimed.

In the drawings :Figure"1 is a perspective of the nut lock. Fig. 2 is a plan view of the nut showing the bolt and locking means in section. Fig. 3 is a section taken on line 33, of Fig.2. Fig. 4 is a detail perspective of the locking member.

Referring to the drawings by numerals, 1 designates the bolt which is threaded in the usual manner, and upon which is placed a nut 2. The nut 2 is provided with an aperture 3 formed in one corner thereof which extends therethrough. .This aperture 3 receives an arm 4 of the locking member which arm is somounted Within the aperture as to allow the arm to rotate within the aperture when the locking member is swung upon the nut. A pocket 5 is formed ln the outer face of-the nut in diametrical ahnement with the aperture 3 .in the opposite corner of the nut and this socket 5 receives the thread-biting tooth 6 which tooth extends parallel wlth the arm 4 and at right which is simple in angles to the body 7. The, inner edge of the tooth 6 is sharpened'upon both faces as illustrated at 8 so as to firmly grip the threads of the bolt. The body of the threadgripping member is curved as illustrated in Fig. 2, the end carrying the thread engaging tooth being curved to a greater extent than the restof the body thereby greatly increasing theefiiciency of thelocking member. The outer edge ofthe threadren'gaging tooth is tapered toward its free end as at 9 so as to allow said tooth to be driven in said socket 5and cause the biting edge 8 of the tooth to enter the threads ofthe 'bolt.

As the tooth 6 engages the threads, an efficient lock will be, produced which may be disengaged from the bolt by placing a tool under the body 7 and raising the same from the .nut. It will be obvious also that the spring action of the body will resist rotation of the nut under ordinary conditions but to lnsure a positive lock,,the tooth 6 is driven .in the socket 5 thereby biting the threads and making it necessary to Withdraw the tooth from the socket in order to remove the nut from the bolt.

A nut lock of the class described comprising a bolt, a nut provided with an aperture formed therein, vided with a'socket formed therein opposite said aperture, a locking member carried by said nut comprising an arm, a curved body partly surrounding said bolt, a thread-engaging tooth carried by the free end of said body, said tooth being sharpened on one edge and being tapered upon its back for allowing said sharpened edge to bite into the threads upon said bolt when said'tooth is driven into said socket.

' 1 In testimony whereof I hereunto aflix 'my signature in presence of two witnesses.

EVAN B. PACK. Wi nesses:

C. D. OBENCHAU, G. D. KLINE.

said nut being pro 

